The document analyzes digipaks of three metal albums: Metallica's 'St. Anger,' Black Sabbath's '13,' and Judas Priest's 'Rocka Rolla.' Each digipak is examined for its unique design elements, color schemes, and how they reflect the metal genre's characteristics. Key details include the use of striking imagery, branding choices without including band names, and the overall aesthetic continuity between album front and back covers.